diff --git a/environments/production.json b/environments/production.json
index c99a461..b7c2dde 100644
--- a/environments/production.json
+++ b/environments/production.json
@@ -74,6 +74,7 @@
     },
     "kosmos-mastodon": {
       "domain": "kosmos.social",
+      "user_address_domain": "kosmos.social",
       "s3_endpoint": "http://localhost:3900",
       "s3_region": "garage",
       "s3_bucket": "kosmos-social",
diff --git a/site-cookbooks/kosmos-akkounts/recipes/default.rb b/site-cookbooks/kosmos-akkounts/recipes/default.rb
index 2a8fb0b..8d11428 100644
--- a/site-cookbooks/kosmos-akkounts/recipes/default.rb
+++ b/site-cookbooks/kosmos-akkounts/recipes/default.rb
@@ -149,6 +149,7 @@ end
 #
 
 env[:mastodon_public_url] = "https://#{node['kosmos-mastodon']['domain']}"
+env[:mastodon_address_domain] = node['kosmos-mastodon']['user_address_domain']
 
 #
 # MediaWiki